Interleaving String not clean code

gistfile1.txt

public class Solution {
    public boolean isInterleave(String s1, String s2, String s3) {
        // Start typing your Java solution below
        // DO NOT write main() function
        if (s1.length() + s2.length() != s3.length())
            return false;
        
        
        boolean[][] sol = new boolean[s1.length() + 1][s2.length() + 1];
        sol[0][0] = true;        
        for (int i = 1; i <= s3.length(); i++) {
            for (int j = 0; j <= s1.length() && j <= i; j++) {
                if (i - j > s2.length())
                    continue;
                boolean l1 = false;
                boolean l2 = false;
                if (j == 0) 
                    l1 = sol[j][i - j - 1] & s2.charAt(i - j - 1) == s3.charAt(i - 1);
                else if (i - j == 0)
                    l2 = sol[j - 1][i - j] & s1.charAt(j - 1) == s3.charAt(i - 1);
                else {
                    l1 = sol[j][i - j - 1] & s2.charAt(i - j - 1) == s3.charAt(i - 1);
                    l2 = sol[j - 1][i - j] & s1.charAt(j - 1) == s3.charAt(i - 1);
                }
                sol[j][i - j] = l1 | l2;
                
            }
        }
        return sol[s1.length()][s2.length()];
    }
}